Test tool holster



FIG. 1 is a front perspective view of a test tool holster showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view, the left side elevational view being a mirror image;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view; and,

FIG. 6 is a top plan view thereof. 

The ornamental design for a test tool holster, as shown and described. 